Ready to drop everything, I note (3,2)
I believe the answer is:
all in
'ready to drop' is the definition.
(I've seen this before)
'everything i note' is the wordplay.
'everything' becomes 'all' (all things).
'note' becomes 'n' (abbreviation).
'all'+'i'+'n'='ALL-IN'
(Other definitions for all in that I've seen before include "Ready to drop" , "get tired?" , "Jiggered" , "expenses and costs included" , "No-one out" .)